TECO T-verter N2 Series - Stall Prevention Settings (Fn_12-Fn_15)

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Fn_12: Stall Prevention
xxx0 : Stall prevention during Acceleration Enable
xxx1 : Stall prevention during Acceleration Disable
xx0x : Stall prevention during Deceleration Enable
xx1x : Stall prevention during Deceleration Disable
x0xx : Stall prevention during Running Enable
x1xx : Stall prevention during Running Disable
0xxx : Stall prevention Decel. Time set in (Fn_02)
1xxx : Stall prevention Decel. Time set in (Fn_15)
Fn_13: Stall prevention level during Accel: 30% ~ 200%
Fn_14: Stall prevention level during running: 30% ~ 200%
Fn_15: Decel time during stall prevention: 0.1sec ~ 3,600 sec
Note:
1. If the acceleration ramp time is set to fast for the size of the load, an over-current trip may
occur during the acceleration period. Setting the proper stall prevention during acceleration
can automatically extend the ramp time to prevent trip when acceleration time is too short.
2. If deceleration time is to short, an over-voltage may occur on DC BUS. Setting the proper stall
prevention during deceleration T-verter can prevent an “OV” trip when deceleration time is
too short.
3. In order to prevent abnormal overload trips during heavy running periods, the T-verter can
lower the output frequency in accordance with deceleration time set by (Fn_02) or (Fn_15)
when (Fn_12) is (1xxx) or when operational current is over the value set in (Fn_14) The
T-verter will return to its normal operating frequency automatically after the current is back to
normal conditions.